A novel aptamer developed for breast cancer cell internalization

Area of Science:

• Biochemistry
• Molecular Biology
• Oncology

Background:

• Breast cancer is a leading cause of mortality in the US, with chemotherapy side effects posing a significant challenge.
• Cell-type-specific drug delivery via internalized probes offers a potential solution to improve treatment efficacy and reduce side effects.
• Nucleic acid aptamers show promise for molecular recognition but their intracellular internalization is not well-established.

Purpose of the Study:

• To develop a cancer-cell-specific DNA aptamer probe for targeted breast cancer therapy.
• To investigate the internalization efficiency and specificity of the developed aptamer in breast cancer cells.

Main Methods:

• Selection of a DNA aptamer against the breast cancer cell line MCF-10AT1 using the cell-SELEX (systematic evolution of ligands by exponential enrichment) method.
• Evaluation of the aptamer's internalization into target cells and its subcellular localization.

Main Results:

• A novel DNA aptamer, KMF2-1a, was successfully selected against breast cancer cells.
• KMF2-1a demonstrated efficient and specific internalization into the endosomes of target breast cancer cells.
• The aptamer showed high specificity for breast cancer cells.

Conclusions:

• The KMF2-1a aptamer is a promising candidate for cell-type-specific intracellular delivery in breast cancer.
• This aptamer holds potential for both diagnostic and therapeutic applications in breast cancer treatment.
• Further research into aptamer-based drug delivery systems is warranted for improved cancer therapies.